Sunroof headliner rattle

[P13tr0]

Does anyone else have a rattle coming from the sliding headliner? It seems worst when cold. I can get rid of the noise by opening and re-closing the sliding headliner, but it's a PITA as I already have to go through a pre flight checklist of button pushing (turning off start/ stop for example).

I will take it in to the dealer, but it would be good if anyone knows how this can be fixed, so I can point them in the right direction and save time.